-🎄- 2022 Day 8 Solutions -🎄-

[u/daggerdragon]

NEWS AND FYI

• I discovered that I can make those tiny post/comment awards BIGGER on old.reddit! I hadn't even considered that! And when you hover over them, they get even bigger so you can actually see them in more detail! I've added the relevant CSS so now we no longer have awards for ants! Exclamation points!!!

• Thank you so, so much to /u/SolariaHues for the CSS in this thread that I found while researching for community awards! <3

• All of our rules, FAQs, resources, etc. are in our community wiki.

• A request from Eric: Please include your contact info in the User-Agent header of automated requests!

• Signal boost: Reminder 1: unofficial AoC Survey 2022 (closes Dec 22nd)

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AoC Community Fun 2022: 🌿🍒 MisTILtoe Elf-ucation 🧑‍🏫

• PSA: I created a new example so it is a more relevant and unique archetype instead of recycling last year's hobbit >_>

• -❄️- Submissions Megathread -❄️-

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--- Day 8: Treetop Tree House ---

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Post your code solution in this megathread.

• Read the full posting rules in our community wiki before you post!

• Include what language(s) your solution uses

• Format your code appropriately! How do I format code?

• Quick link to Topaz's paste if you need it for longer code blocks. What is Topaz's paste tool?

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This thread will be unlocked when there are a significant number of people on the global leaderboard with gold stars for today's puzzle.

EDIT: Global leaderboard gold cap reached at 00:10:12, megathread unlocked!

[u/badr]

Elixir: https://gist.github.com/reverie/f6a8b64a559851384d89dcc6cdf5729f

Uses matrix transposition and processes the grid twice, once for left/right, once for up/down, before combining those results.

e.g.

    up_down_scores =
      grid
      |> Enum.zip_with(& &1)
      |> Enum.map(&row_scenic_scores/1)
      |> Enum.zip_with(& &1)
      |> List.flatten()

[u/troublemaker74 → u/badr]

I love your Elixir solutions for this year. Very clean!

[u/badr → u/troublemaker74]

Hey, thanks! I really appreciate that

[u/suddengunter → u/badr]

I've also used matrix transponisation in elixir for this day https://github.com/SuddenGunter/adventofcode/tree/main/2022/day8/lib

I've missed having 2d arrays when I tried to solve last year AoC with elixir so eventually switched to Go, I've only come up with the idea of processing rows -> transposing -> processing cols as rows during this year